IPC-TM-650 EN 2022 试验方法.pdf - 第262页

IPC-249-2 Figure 2 Free Wheeling Rotary Drum T est Fixture 6 Inch Diameter Testing Machine Specimen Testing Fixture Testing Machine IPC-249-3 Figure 3 Sliding Plate T est Fixture ▼ ▼ ▼ ▼ ▼ ▼ Specimen .150" Specimen …

1 Scope This test method defines the procedure for deter-

mining the bond strength of metal foils that are 18 microns

thick or greater clad flexible dielectric material as nominally

defined being measured with a 90° peel.

2 Applicable Documents None

3 Test Specimens If a statistically sound evaluation by a

given supplier can prove that die cut and etched specimens

differ, the preparation giving the lower measurement can be

the only preparation tested. In case of conflict, the die cut

sample will be used as the referee method. The sample

preparation will be the same for as received, after solder and

after aging.

3.1 Type A – Etched Specimen

3.1.1

The test specimen shall consist of an etched conduc-

tor pattern in accordance with Figure 1. Note: Conductors

are 3.2 mm wide by 228.6 mm long [0.125 in wide by

9 in long].

3.1.2 A minimum of four specimens, two from the machine

direction (MD) and two from the transverse direction (TD),

shall be prepared for each of the procedure Methods A, C,

E. If a statistically sound evaluation by a given supplier can

prove that MD and TD measurements differ, the direction giv-

ing the lower measurement can be the only direction tested. If

the two directions are the same, only the MD direction needs

to be tested. In the event a test specimen tears during test-

ing, another test specimen will be prepared to replace it.

3.1.3 For double clad laminate, a separate sample unit shall

be prepared and tested for each side.

3.2 Type B – Die Cut Specimen

3.2.1

The test specimen shall consist of a strip of clad flex-

ible material 12.7 mm wide by 228.6 mm long [1/2 in wide by

9 in long].

3.2.2 A minimum of four specimens, two from the machine

direction and two from the transverse direction, shall be pre-

pared for each of the procedure Methods B, D, F. If a statis-

tically sound evaluation by a given supplier can prove that MD

and TD measurements differ, the direction giving the lower

measurement can be the only direction tested. If the two

directions are the same, only the MD direction needs to be

tested.

3.2.3 For double clad laminate, a separate sample unit shall

be prepared and tested for each side. The metal foil on the

non-test side may remain to provide stability to prevent tent-

ing of the specimen from the German Wheel (free wheel rotary

drum). Both samples must be the same with respect to being

with or without the non-test side metal foil.

4 Test Equipment

4.1 Testing Machine

Power driven testing machine,

crosshead autographic type, or an equivalent constant speed

drive machine.

4.2 Sample Cutter Thwing Albert sample cutter, Model

No. JDC-50, or equivalent.

4.3 Test Fixture Free wheeling rotary drum (Figure 2), slid-

ing plate (Figure 3), or equivalent. The referee fixture will be a

152.4 mm [6.0 in] diameter free wheeling rotary drum.

IPC-249-1

Figure 1 Type A Peel Strength Test Pattern

▼

3.2mm [0.125"]

228.6mm

[9"]

▼

3000 Lakeside Drive, Suite 309S

Bannockburn, IL 60015-1249

IPC-TM-650

TEST METHODS MANUAL

Number

2.4.9

Subject

Peel Strength, Flexible Dielectric Materials

Date

04/14

Revision

Originating Task Group

Flexible Circuits Test Methods Subcommittee

(D-15)

Material in this Test Methods Manual was voluntarily established by Technical Committees of IPC. This material is advisory only

and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this

material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.

Equipment referenced is for the convenience of the user and does not imply endorsement by IPC.

Page1of6

IPC-249-2

Figure 2 Free Wheeling Rotary Drum Test Fixture

6 Inch Diameter

Testing

Machine

Specimen

Testing

Fixture

Testing

Machine

IPC-249-3

Figure 3 Sliding Plate Test Fixture

▼

Specimen

.150"

Specimen Holders

Clip for

Fastening Cord

Conductor

▼

Test bed with machined grooves

to permit free movement of

specimen holders

Testing

Machine

Pulley

Clasp

Conductor

Wire

Cord

Yoke

Testing

Machine

▼

IPC-TM-650

Number

2.4.9

Subject

Peel Strength, Flexible Dielectric Materials

Date

04/14

Revision

Page2of6

4.4 Solder Pot An electrically-heated, thermostatically con-

trolled solder pot of adequate dimensions to accommodate

the specimen and contain no less than 2.25 Kg [5 pounds] of

SN60 solder.

4.5 Automatic Temperature Cycling Chamber (See

5.5.3.)

5 Procedure

5.1 MethodA–AsReceived – Etched Specimen

5.1.1

Prepare Type A etched conductor test specimens in

accordance with Figure 1 using standard commercial prac-

tices per 3.1.2.

5.1.2 Condition specimens for 24 hours at 23 °C±2°C

[73.4 °F ± 3.6 °F] and 50% ± 5% relative humidity. Stabiliza-

tion time may be reduced if statistically sound evidence has

been generated on the specific product line to support the

shorter stabilization times.

5.1.3 Attach the specimen to the test fixture with double-

sided tape, cement, and/or mechanical clamps. The referee

attachment technique will be double sided adhesive tape.

5.1.4 Peel the conductor at a rate (crosshead speed) of

50.8 mm/minute [2 in/minute]. The peel load shall fall within

15% to 85% of the range of the scale used on the testing

machine. The peel load shall be continuously recorded, and

the recorded load for the entire length of the peeled conduc-

tor shall be evaluated per 5.7.1. A minimum of 57.2 mm

[2-1/4 in] must be peeled, the first 6.4 mm [1/4 in] to be dis-

regarded.

5.2 MethodB–AsReceived – Die Cut Specimen

5.2.1

Cut Type B test specimens with the Thwing Albert

sample cutter per 3.2.2.

5.2.2 Condition specimens for 24 hours at 23 °C±2°C

[73.4 °F ± 3.6 °F] and 50% ± 5% relative humidity. Stabiliza-

tion times may be reduced if statistically sound evidence has

been generated on the specific product line to support the

shorter stabilization times.

5.2.3 Attach the specimen to the test fixture with double-

sided tape, cement, and/or mechanical clamps. The referee

attachment technique will be double sided adhesive tape.

5.2.4 Peel the foil at a rate (crosshead speed) of 50.8 mm/

minute [2 in/minute]. The peel load shall fall within 15%

to 85% of the range of the scale used on the testing machine.

The peel load shall be continuously recorded, and the

recorded load for the entire length of the peeled conductor

shall be evaluated per 5.71. A minimum of 57.2 mm [2-1/4 in]

must be peeled, the first 6.4 mm [1/4 in] to be disregarded.

5.3 Method C – Solder Float – Etched Specimen

5.3.1

Prepare Type A etched conductor test specimen in

accordance with Figure 1 using standard commercial prac-

tices per 3.2.1.

5.3.2 Dry the test specimens in an area circulating oven

maintained at 135 °C ± 10 °C [275 °F ± 18 °F] for one hour.

5.3.3 Remove the specimen from the conditioning chamber,

apply solder stop (e.g., petroleum jelly) to the conductor side

and float each specimen, conductor side down, just beneath

the surface of molten solder at 288 °C±6°C[550 °F ± 10 °F]

for at least five seconds. A solder float test fixture that keeps

the test specimen flat and just below the solder surface shall

be used. Agitate the specimen from side to side during

immersion, then remove the specimen and tap the edge to

remove excess solder. Suitable procedures shall be used to

ensure that solder does not remain on test specimen.

5.3.4 Repeat steps 5.1.2 through 5.1.4 as performed in

Method A.

5.4 Method D – Solder Float – Die Cut Specimen

5.4.1

Cut Type B test specimens with the Thwing Albert

sample cutter per 3.2.1.

5.4.2 Dry the test specimens in an air circulating oven main-

tained at 135 °C ± 10 °C [275 °F ± 18 °F] for one hour.

5.4.3 Remove the specimen from the conditioning chamber,

apply solder stop (e.g., petroleum jelly) and float each speci-

men, conductor side down, just beneath the surface of mol-

ten solder at 288 °C±6°C[550 °F ± 10 °F] for at least five

seconds. A solder float test fixture that keeps the test

specimen flat and just below the solder surface shall be used.

Agitate the specimen from side to side during immersion, then

remove the specimen and tap the edge to remove excess

solder. Suitable procedures shall be used to ensure that sol-

der does not remain on test specimen.

IPC-TM-650

Number

2.4.9

Subject

Peel Strength, Flexible Dielectric Materials

Date

04/14

Revision

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